These are test programs for the SDL library:

checkkeys Watch the key events to check the keyboard

loopwave Audio test -- loop playing a WAV file

testaudioinfo Lists audio device capabilities

testcdrom Sample audio CD control program

testerror Tests multi-threaded error handling

testfile Tests RWops layer

testgl2 A very simple example of using OpenGL with SDL

testhread Hacked up test of multi-threading

testiconv Tests international string conversion

testjoystick List joysticks and watch joystick events

testkeys List the available keyboard keys

testloadso Tests the loadable library layer

testlock Hacked up test of multi-threading and locking

testmultiaudio Tests using several audio devices

testoverlay2 Tests the overlay flickering/scaling during playback.

testpalette Tests palette color cycling

testplatform Tests types, endianness and cpu capabilities

testsem Tests SDL's semaphore implementation

testshape Tests shaped windows

testsprite2 Example of fast sprite movement on the screen

testtimer Test the timer facilities

testver Check the version and dynamic loading and endianness

testwm2 Test window manager -- title, icon, events

torturethread Simple test for thread creation/destruction

controllermap Useful to generate Game Controller API compatible maps